Got Offer- Non_resident conditional offer(CA) how to Deal?

I really cannot imagine why SA would make this as a condition for employment. Are you sure this is the case? Your tax status is an entirely private matter and has no effect on the company. You should certainly aim at becoming a non resident but ultimately it would be you (not Aramco) who would be penalised if you didn't. I know several expats (not SA employees though) who have left their wife/kids in Canada and therefore are not eligible to non-res status. Of course it's a big hit on their finances..

About keeping a house: I know a fellow who kept his but rented it out and managed to get NR status. Renting with a proper lease is crucial here as the property can then be seen as an investment rather than a residence. Yet I know another guy who kept his condo and whose NR application was rejected by the CRA. The whole thing is very arbitrary!

There are other threads on the forum regarding Canadian non residency but by all means do not keep your Medicare card -- this is a big no-no! You must also return your driver's licence but if possible after having secured one in KSA. Same thing for your credit card, close the account after having gotten one from a bank abroad. Do not keep a cell phone subscription, PO Box, or bank safety box. You must sell your car, do not keep it registered in Canada, another big no-no. If you are a professional engineer you should resign from your provincial professional engineer association.

If you chose to keep a bank account or investment account you MUST make a change of address and use a postal address outside Canada. Do not use the address of a friend or relative in Canada. The bank will also automatically withold a non resident tax from interests or capital gains.

Considering the enormous financial burden of not being non resident do your utmost to severe all the links you can. Good luck!